1st Tome: Right at the beginning in the bedrooms, in a bunk bed, under the pillow.

1st Grimoire: In the door game, hit the brick with the circle with a cross on it until the door next to it opens. At the bottom there is a room with a switch on a shelf. You reach it by climbing on the other shelves. Another door will open in that corridor with a hole in the wall and the Grimoire inside.

2nd Tome: After crossing the three gates, enter this tunnel and face left.

2nd Grimoire: In this area after jumping down the sewers there are some keys, look for them. There are three possible locations. Continue until before going down the spiral stairs. Climb up the rocks (since this was difficult, they have put more rocks), cross the bridge and continue until you find the chest with chains.

3rd Tome: It is behind this Altar.